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Commit 4fa6811b authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh Committed by Len Brown
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ACPI: thinkpad-acpi: prepare light and LED for sysfs support 



Do some preparatory work to add sysfs support to the thinklight and
thinkpad leds driver.

Signed-off-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 95e57ab2

drivers/misc/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -245,6 +245,8 @@ config THINKPAD_ACPI 
	select HWMON

	select NVRAM

	depends on INPUT

	select NEW_LEDS

	select LEDS_CLASS

	---help---

	  This is a driver for the IBM and Lenovo ThinkPad laptops. It adds

	  support for Fn-Fx key combinations, Bluetooth control, video

drivers/misc/thinkpad_acpi.c

+136 −55
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ 
#include <linux/hwmon.h>

#include <linux/hwmon-sysfs.h>

#include <linux/input.h>

#include <linux/leds.h>

#include <asm/uaccess.h>



#include <linux/dmi.h>
@@ -85,6 +86,8 @@ 
#define TP_CMOS_VOLUME_MUTE	2

#define TP_CMOS_BRIGHTNESS_UP	4

#define TP_CMOS_BRIGHTNESS_DOWN	5

#define TP_CMOS_THINKLIGHT_ON	12

#define TP_CMOS_THINKLIGHT_OFF	13



/* NVRAM Addresses */

enum tp_nvram_addr {
@@ -269,6 +272,13 @@ static enum { 
static int experimental;

static u32 dbg_level;



/* Special LED class that can defer work */

struct tpacpi_led_classdev {

	struct led_classdev led_classdev;

	struct work_struct work;

	enum led_brightness new_brightness;

};



/****************************************************************************

 ****************************************************************************

 *
@@ -3237,6 +3247,39 @@ static struct ibm_struct video_driver_data = { 
TPACPI_HANDLE(lght, root, "\\LGHT");	/* A21e, A2xm/p, T20-22, X20-21 */

TPACPI_HANDLE(ledb, ec, "LEDB");		/* G4x */



static int light_get_status(void)

{

	int status = 0;



	if (tp_features.light_status) {

		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))

			return -EIO;

		return (!!status);

	}



	return -ENXIO;

}



static int light_set_status(int status)

{

	int rc;



	if (tp_features.light) {

		if (cmos_handle) {

			rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",

					(status)?

						TP_CMOS_THINKLIGHT_ON :

						TP_CMOS_THINKLIGHT_OFF);

		} else {

			rc = acpi_evalf(lght_handle, NULL, NULL, "vd",

					(status)? 1 : 0);

		}

		return (rc)? 0 : -EIO;

	}



	return -ENXIO;

}



static int __init light_init(struct ibm_init_struct *iibm)

{

	vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
@@ -3263,7 +3306,7 @@ static int __init light_init(struct ibm_init_struct *iibm) 
static int light_read(char *p)

{

	int len = 0;

	int status = 0;

	int status;



	if (!tp_features.light) {

		len += sprintf(p + len, "status:\t\tnot supported\n");
@@ -3271,8 +3314,9 @@ static int light_read(char *p) 
		len += sprintf(p + len, "status:\t\tunknown\n");

		len += sprintf(p + len, "commands:\ton, off\n");

	} else {

		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))

			return -EIO;

		status = light_get_status();

		if (status < 0)

			return status;

		len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));

		len += sprintf(p + len, "commands:\ton, off\n");

	}
@@ -3282,31 +3326,22 @@ static int light_read(char *p) 


static int light_write(char *buf)

{

	int cmos_cmd, lght_cmd;

	char *cmd;

	int success;

	int newstatus = 0;



	if (!tp_features.light)

		return -ENODEV;



	while ((cmd = next_cmd(&buf))) {

		if (strlencmp(cmd, "on") == 0) {

			cmos_cmd = 0x0c;

			lght_cmd = 1;

			newstatus = 1;

		} else if (strlencmp(cmd, "off") == 0) {

			cmos_cmd = 0x0d;

			lght_cmd = 0;

			newstatus = 0;

		} else

			return -EINVAL;



		success = cmos_handle ?

		    acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :

		    acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);

		if (!success)

			return -EIO;

	}



	return 0;

	return light_set_status(newstatus);

}



static struct ibm_struct light_driver_data = {
@@ -3710,6 +3745,12 @@ enum { /* For TPACPI_LED_OLD */ 
	TPACPI_LED_EC_HLMS = 0x0e,	/* EC reg to select led to command */

};



enum led_status_t {

	TPACPI_LED_OFF = 0,

	TPACPI_LED_ON,

	TPACPI_LED_BLINK,

};



static enum led_access_mode led_supported;



TPACPI_HANDLE(led, ec, "SLED",	/* 570 */
@@ -3718,6 +3759,69 @@ TPACPI_HANDLE(led, ec, "SLED", /* 570 */ 
	   "LED",		/* all others */

	   );			/* R30, R31 */



static int led_get_status(unsigned int led)

{

	int status;



	switch (led_supported) {

	case TPACPI_LED_570:

		if (!acpi_evalf(ec_handle,

				&status, "GLED", "dd", 1 << led))

			return -EIO;

		return (status == 0)?

				TPACPI_LED_OFF :

				((status == 1)?

					TPACPI_LED_ON :

					TPACPI_LED_BLINK);

	default:

		return -ENXIO;

	}



	/* not reached */

}



static int led_set_status(unsigned int led, enum led_status_t ledstatus)

{

	/* off, on, blink. Index is led_status_t */

	static const int const led_sled_arg1[] = { 0, 1, 3 };

	static const int const led_exp_hlbl[] = { 0, 0, 1 };	/* led# * */

	static const int const led_exp_hlcl[] = { 0, 1, 1 };	/* led# * */

	static const int const led_led_arg1[] = { 0, 0x80, 0xc0 };



	int rc = 0;



	switch (led_supported) {

	case TPACPI_LED_570:

			/* 570 */

			led = 1 << led;

			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",

					led, led_sled_arg1[ledstatus]))

				rc = -EIO;

			break;

	case TPACPI_LED_OLD:

			/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */

			led = 1 << led;

			rc = ec_write(TPACPI_LED_EC_HLMS, led);

			if (rc >= 0)

				rc = ec_write(TPACPI_LED_EC_HLBL,

					      led * led_exp_hlbl[ledstatus]);

			if (rc >= 0)

				rc = ec_write(TPACPI_LED_EC_HLCL,

					       led * led_exp_hlcl[ledstatus]);

			break;

	case TPACPI_LED_NEW:

			/* all others */

			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",

					led, led_led_arg1[ledstatus]))

				rc = -EIO;

			break;

	default:

		rc = -ENXIO;

	}



	return rc;

}



static int __init led_init(struct ibm_init_struct *iibm)

{

	vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
@@ -3743,7 +3847,9 @@ static int __init led_init(struct ibm_init_struct *iibm) 
	return (led_supported != TPACPI_LED_NONE)? 0 : 1;

}



#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))

#define str_led_status(s) \

	((s) == TPACPI_LED_OFF ? "off" : \

		((s) == TPACPI_LED_ON ? "on" : "blinking"))



static int led_read(char *p)

{
@@ -3759,11 +3865,11 @@ static int led_read(char *p) 
		/* 570 */

		int i, status;

		for (i = 0; i < 8; i++) {

			if (!acpi_evalf(ec_handle,

					&status, "GLED", "dd", 1 << i))

			status = led_get_status(i);

			if (status < 0)

				return -EIO;

			len += sprintf(p + len, "%d:\t\t%s\n",

				       i, led_status(status));

				       i, str_led_status(status));

		}

	}
@@ -3773,16 +3879,11 @@ static int led_read(char *p) 
	return len;

}



/* off, on, blink */

static const int led_sled_arg1[] = { 0, 1, 3 };

static const int led_exp_hlbl[] = { 0, 0, 1 };	/* led# * */

static const int led_exp_hlcl[] = { 0, 1, 1 };	/* led# * */

static const int led_led_arg1[] = { 0, 0x80, 0xc0 };



static int led_write(char *buf)

{

	char *cmd;

	int led, ind, ret;

	int led, rc;

	enum led_status_t s;



	if (!led_supported)

		return -ENODEV;
@@ -3792,38 +3893,18 @@ static int led_write(char *buf) 
			return -EINVAL;



		if (strstr(cmd, "off")) {

			ind = 0;

			s = TPACPI_LED_OFF;

		} else if (strstr(cmd, "on")) {

			ind = 1;

			s = TPACPI_LED_ON;

		} else if (strstr(cmd, "blink")) {

			ind = 2;

		} else

			return -EINVAL;



		if (led_supported == TPACPI_LED_570) {

			/* 570 */

			led = 1 << led;

			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",

					led, led_sled_arg1[ind]))

				return -EIO;

		} else if (led_supported == TPACPI_LED_OLD) {

			/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */

			led = 1 << led;

			ret = ec_write(TPACPI_LED_EC_HLMS, led);

			if (ret >= 0)

				ret = ec_write(TPACPI_LED_EC_HLBL,

						led * led_exp_hlbl[ind]);

			if (ret >= 0)

				ret = ec_write(TPACPI_LED_EC_HLCL,

						led * led_exp_hlcl[ind]);

			if (ret < 0)

				return ret;

			s = TPACPI_LED_BLINK;

		} else {

			/* all others */

			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",

					led, led_led_arg1[ind]))

				return -EIO;

			return -EINVAL;

		}



		rc = led_set_status(led, s);

		if (rc < 0)

			return rc;

	}



	return 0;